Gate valve



Dec. 26, 1950 F. E. WOLFE 2,535,525

GATE VALVE Filed Aug. 23, 1948 Q 2 Sheets-Sheet 1 Eli mlfe INVENTOR BY Iv :1

ATTORNEYS.

Dec. 26, 1950 F. E. WOLFE 2,535,525

GATE VALVE File ad Aug. 23, 1948 2 Sheets-Shed 2 6 46' 48 2a 23 Ar 3 1ATTORNEYS.

Patented Dec. 26, 1950 UNITED STATES v PATENT OFFICE GATE VALVE ,Fred E.Wolfe,.Morgantown, W. Va. ApplicationAugust' zla, 1948, Serial No.45,655 .1 Claim. (01. 251-17) This invention vrelates to improvements invalves.

An object of the invention is to provide an improved gate valveconstruction in which the gate linkage thus insuresan absolutely tightclosure of the gate, the gate being supported by interconnected linkageand directly connected with and operated by a threaded valve stemmounted through the bonnet portion of the valve casing.

Another object of the invention is to provide an improved gate valveincluding a valve casing and detachable bonnet therefor, together with areplaceable threaded gate seat and cooperating gate supported byinterconnected linkage, being directly connected with and operated by athreaded valve stem connected through a stem actuating threaded bushingforming a portion of a bonnet which will be detachably mounted upon thevalve casing.

A further object of the invention is to provide an improved form andconstruction of gate valve which will be highly efficient in operationand relatively inexpensive to manufacture and produce.

Other objects will appear as the description proceeds.

In the accompanying drawings which form a part of this application:

Figure 1 is a vertical sectional view through the improved gate valveshowing the gate in closed position upon the gate seat.

Fig. 2 is a vertical sectional view through the improved gate valveshowing the gate in open position.

Fig. 3 is a sectional view taken on the line 3--3 of Fig. 1.

Like characters of reference are used throughout the followingspecification and the accompanying drawings to designate correspondingparts.

In carrying out the invention, there is shown and provided an improvedform and construction of gate valve including a valve casing I havingoppositely disposed inlet and outlet ports 2 and 3, and annularattaching flanges 4 and 5 disposed about said ports, the same beingprovided with spaced circumferentially disposed openings 6 for receivingcoupling bolts (not shown).

A web 1 is formed within the valve casing l adjacent its inlet end andis formed with a threaded bore 8 in which an externally threaded gateseat 9 will be received. The gate seat'9 is also formed with an annularflange l0 upon which a disc-shaped gate II will rest When the valve isin closed position.

"A pair of spaced ears l12*a1e formed uponuthe inner surface of the"gate H and areapertured to receive the pivot pin l3. A single :link.l'4havingapertured eyes 15 and .15 in itsopposite ends is supported uponthe upper pivot :pin H mounted transversely of the upper portion 18 ofthe valve casing 1, while the lower eye .l6.of the link is disposedabout the central portioniof the pivot pin [3.

A gate actuating link I9 is formed with oppositely extending spacedapertured ears Hand 21, and the apertured ears 2!] are adapted to bemounted upon the pivot pin I3 at the'opposite sides of 'the ,lower eyel5 of the link .14 and between said eye l6 and the spaced ears l2 of thegate II.

An annular flange 22 is formed about the upper portion l8 of the casingl, and is provided with circumferentially arranged openings 23 throughwhich the bolts 24 are adapted to extend.

A bonnet 25 having an annular flange 26 is adapted to seat on a gasket21 disposed upon the annular flange 22, with the bolts 24 extendingthrough openings 28 formed through said flange 26, said assembly beingheld tightly together by means of the bolts 24 and the nuts 29 threadedthereon.

The upper end 30 of the bonnet 25 is cylindrical in shape and formedwith a laterally extending annular flange 3| about its upper end. Theupper portion of the upper end 30 of the bonnet 25 is vertically boredat 32 to receive the valve stem packing 33, and a reduced bore 34 isformed below and axially of the bore 32 of a size to receive thevertically disposed valve actuating stem 35. A flanged gland 36 isdisposed in the bore 32 in contact with the packing 33, and is securedin place by the plurality of bolts 31 and nuts 38, said bolts 31extending through the flange 3| and the flange on the gland 36.

Spaced vertical arms 39 are formed integrally with the upper portion end30 of the bonnet 25, and support the threaded nut 4e upon their upperends, said nut 40 being freely rotatable and forming the hub of thevalve actuatin hand wheel 4 I. A threaded lock nut 42 is secured uponthe threaded upper end 43 of the valve stem actuating nut 40 forsecuring the parts in assembled position.

The upper end of the valve actuating stem 35 is threaded at 44 forreception within the internally threaded nut 40, while the lower end ofthe stem 35 is formed with a transverse collar 45, through which the pin46 extends. Spaced links 48 and 49 are supported at their upper endsupon the ends of the pin 46, while their lower ends are supported uponthe opposite ends of the connecting pin 50 which extends through theupper ears 2| of the gate actuating link 19.

A single link 53 is pivotally supported at one end 54 upon the pin 55mounted transversely of the upper portion I8 of the valve casing I,diametrically opposite to the pivot pin [1, and the opposite end 56 issupported centrally upon the connecting pin 50.

From the foregoing description, it will be seen that when the hand wheelM is rotated in one direction, the valve stem 35 will move upwardly andthrough the various links associated therewith, will cause the gate IIto unseat from the annular flange ll! of the gate seat 9. Conversely,when the hand wheel 4| is rotated in the opposite direction, the valvestem 35 will move downwardly causing the associated links to force thegate II upon the annular flange ID of the gate seat 9, thereby cuttingoil the flow through the valve casing I.

While the preferred embodiment of the instant invention has beenillustrated and described, it will be understood that it is not intendedto limit the scope of the invention thereto, as many minor changes indetail of construction may be resorted to without departure from thespirit of the invention.

Having thus described my invention what I claim as new and desire tosecure by Letters Patent of the United States is:

A valve of the character described, comprising a valve casing includinga bonnet, said casing having horizontal aligned inlet and outlet ports,a valve seat formed within the casing spaced from the inlet port, avalve stem operating vertically through the valve bonnet and extendinginto the valve casing, spaced links pivotally connected to the end ofthe valve stem within the casing, on opposite sides of the valve stem, asingle link pivotally connected with the valve casing above the outletport, a gate actuating link, a connecting pin pivotally connecting thesingle link and gate actuating link between said spaced links, a gatevalve, to which the gate actuating link is pivotally connected, a singlelink pivotally connected with the wall of the casing directly over theinlet port, and a pivot pin connecting the latter link with said gatevalve and the gate actuating link, whereby vertical movement of thevalve stem swings the gate valve to a position centrally of the valvecasing substantially above the path of travel of water flowing throughthe valve casing.

FRED E. WOLFE.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS Num er Name Date 430,301 Schenck June 17, 1890971,802 Tanner Oct. 4, 1910 2,373,001 Allen Apr. 3, 1945 2,394,471 PaulFeb. 5, 1946

